Essex
Solar panels in Chelmsford, priced before anyone visits.
A 12-panel roof in Chelmsford makes about 6,750 kWh a year and costs £6,360 installed; a free 30-minute video call sizes it to yours.
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Sunlight in Chelmsford, in numbers
Chelmsford's best month is July, at 129.1 kWh per kWp; December manages 38.4. Over the year that comes to 1,061 kWh per kWp, level with our Essex county estimate.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 40.5 |
| February | 54.2 |
| March | 91.1 |
| April | 119 |
| May | 127 |
| June | 127 |
| July | 129 |
| August | 116 |
| September | 100 |
| October | 69.2 |
| November | 49.8 |
| December | 38.4 |
Source: PVGIS v5.2 (European Commission JRC), SARAH3 database, 1 kWp, 14% system loss, 35 degree pitch, due south, checked September 2026.
Our GB average is 925 kWh per kWp a year, the mean of the 85 county PVGIS estimates we publish; at 1,061, Chelmsford is 15% above it.
How Chelmsford compares
Chelmsford is one of 46 Essex towns we track, and it ranks 25th of 46 for solar yield. The House of Commons Library settlement data classes it as a large town of 115,807 people. At 1,061 kWh per kWp a year, a typical 12 panel system here pays for itself in around 6.7 years on the 12p scenario: £944 of year one benefit against £6,360 installed, £247 of that benefit from cutting 26.32p imports with your own generation.
Treat these as calibration rather than a quote. The calculator below runs the same model, opened on Chelmsford's own yield, and prices a 12 panel system at £6,360 installed before any battery. Your free design call reworks every number for your actual roof, its shading and your usage.
Chelmsford is its own local planning authority area, and its House of Commons Library settlement class is large town.
The charger is in the installed price but left out of payback: charging savings depend on your mileage and tariff, which the design call models properly.
Your real roof and usage, worked through on a free 30-minute video call. Use the full form or leave three details below.
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Three details. We call or text within one working day to book your free 30-minute design call, on video or by phone if you prefer.
Generation is modelled from PVGIS satellite data for Chelmsford's own coordinates (51.73696, 0.48034), using the same 26.32p/kWh import value and £1,000 per kWp installed pricing as every Clearline estimate; the methodology is on our help page.
UK Power Networks and your Chelmsford connection
The distribution network operator (DNO) for Chelmsford is UK Power Networks, which runs the East England licence area.
For a typical home the paperwork is light: a system of up to 3.68kW per phase goes through G98, which means UK Power Networks is notified within 28 days of switch-on rather than asked beforehand.
Larger systems go through G99 instead, applied for before installation. On timing: Ofgem's guaranteed standard for a low voltage generation connection quotation is 45 working days, with £80 paid for each working day late, and it binds UK Power Networks as it does every network operator.
Sources: NESO DNO licence areas (3 May 2024); Ofgem, Distributed Generation Standards Direction guidance, checked 27 September 2026. G98 vs G99, explained.
Heat pumps and EV charging in Chelmsford
A heat pump in Chelmsford
In December, the darkest month here, 12 panels in Chelmsford make about 240 kWh. That is when a heat pump runs hardest, so its running cost in Chelmsford comes down to the tariff and the flow temperature rather than the roof.
In England, the Boiler Upgrade Scheme pays £7,500 towards an air source or ground source heat pump and £2,500 towards an air-to-air one, with £1,500 more until March 2027 for homes heated by oil or LPG with no mains gas (gov.uk, checked 28 September 2026).
Charging an EV in Chelmsford
Summer is where a car earns its place. In July, 12 panels in Chelmsford make about 820 kWh, against roughly 70 kWh a typical home uses in daylight that month on our calculator's typical-use settings, so there is surplus a smart charger can put into the car instead of exporting it.
If you rent, or own a flat, and have private off-street parking, the government chargepoint grant covers 75% of the cost, capped at £500 a socket, until 31 March 2027 (gov.uk, checked 28 September 2026). The calculator above prices a 7.4kW smart charger from £1,100 installed.
What the named kit costs, installed
Every system is designed around your roof on the free call before anything is fitted.
Solar panel servicing and repair in Chelmsford
The same sourced benchmarks apply in Chelmsford as everywhere we cover: honest repair pricing and what a service should include.
Solar in Chelmsford: your questions answered
How much electricity do solar panels make in Chelmsford?
About 6,750 kWh a year from 12 panels (6.36 kWp), on PVGIS satellite data for Chelmsford: 1,061 kWh per kWp, or 2.91 peak sun hours a day on average. July is the strongest month, at about 820 kWh.
What does a typical solar system cost in Chelmsford?
Solar is priced at £1,000 per kWp installed wherever you live, so a 12-panel, 6.36 kWp system costs £6,360 in Chelmsford, exactly as it would anywhere else, before any battery. Location changes what the system makes, not what it costs: here that is about 6,750 kWh a year. The final figure comes from your roof on the design call.
Which DNO covers Chelmsford, and what does it need from me?
UK Power Networks covers Chelmsford. A home system of up to 3.68kW per phase is notified to UK Power Networks within 28 days of commissioning under G98, and nothing waits on approval. Larger outputs need a G99 application before work starts. Ofgem's guaranteed standard for a low voltage generation connection quotation is 45 working days, with £80 paid for each working day late, and it binds UK Power Networks as it does every network operator.
What happens to the solar I do not use in Chelmsford?
Around £697 a year at 12p per kWh, for the roughly 5,811 kWh a 12-panel system in Chelmsford exports with typical use. Rates vary by supplier and some need their own tariff; the export rates table is dated and sourced.
How much solar does Chelmsford get in December?
December is the low point: about 240 kWh from a 12-panel system in Chelmsford, on PVGIS data, rising to 820 kWh in July. From November to February the same system makes about 1,160 kWh in total, which is why a battery charged off-peak does more of the work in winter.
How Chelmsford compares with its neighbours
The six closest towns we publish, run through the identical PVGIS query as Chelmsford.
| Town | kWh per kWp a year | vs Chelmsford |
|---|---|---|
| Chelmsford | 1,061 | this town |
| Billericay | 1,062 | +1 kWh |
| Runwell | 1,070 | +9 kWh |
| Witham | 1,075 | +14 kWh |
| South Woodham Ferrers | 1,088 | +27 kWh |
| Maldon | 1,086 | +25 kWh |
| Great Notley | 1,062 | +1 kWh |
Same PVGIS v5.2 query for every town. Small differences are within year-to-year weather; more than about 30 kWh per kWp apart is geography.
Also for Chelmsford: Solar panels in Chelmsford from OVO Solar & Battery
Also near Chelmsford
See a number before you speak to anyone
Answer a few questions about your roof and usage and see an instant solar and battery estimate. No email needed to see the result.
Guides worth reading before your call
Sourced, dated and written by us. The same ground we cover on your free call.
How long do solar panels last? 25 to 30 years, in practice
The panels outlast the inverter by a wide margin. Plan for that, not for cleaning.
Read the guide →What a battery gateway actually does
Without a gateway your system shuts down when the grid does. Here is what the box actually does.
Read the guide →Three phase and EV charging: what actually changes
Three phase buys 22kW charging. Most cars cannot use it, and load balancing usually solves the real problem.
Read the guide →How much does a heat pump cost? The 2026 numbers, before and after the grant
UK median installed cost around £12,908, before the up to £7,500 grant comes off.
Read the guide →Why the best export rates always carry conditions
The top export rates are acquisition offers. Here is how to price the condition.
Read the guide →HIES explained: what the badge actually protects, and when
What HIES protects: deposits up to 25 percent capped at 5,000 pounds, and your workmanship guarantee.
Read the guide →Get my free quote
Takes about two minutes. We call or text within one working day to book your free 30-minute video design call at a time that suits you. We design it around your roof and your numbers, and our MCS-certified, fully insured installation teams install it.